Pro Stock

what is the difference between regular flex and "pro" flex in a retail store hockey stick?

i was looking and it definitly wasn't a pro stock stick but it said pro flex? it said on the shaft 30 day warranty so thats how i know it's a regular stick and not a pro stock stick and i saw a Mission c4 with a hossa pattern and again is said the 30 day warranty but said "pro" above hossa?

It means you can work up a better rhythm when using it to beat people with D